This is all about two collections of historical microphones in the Netherlands. and a valuable partner in the United States. Combined, these two collections probably form the most complete and important summary of vintage microphones in Holland. Fascinated by the history of microphones since the early days of radio broadcasting and music recording, two friends have managed to establish this overview of microphone development over a period of about 50 years. For their activities in building up their collections, they benefit highly from various fruitful contacts with a valuable partner in the United States.